Dough-mixing machine.



0. CHAMBERS, JR- DOUGH MIXING MAGHINE. APPLICATION FILED AUG. 16, 1906.

w L T w m y H 1 S 1 "P m M w d 6 6 b n 6 P 3 M III I m i 6 h 2 I 2 L 0 2 J 1 2 9 mm 70!? We 25w WIT/JESSE 712w 4 a .4 TTORNEY.

O. CHAMBERS, JR. DOUGH MIXING MACHINE. APPLIOATION FILED AUG. 16,1906.

921,202, Patented May 11, 1909.

6SHEETBSHEET 2.

WI TNESSES Www I I/MM l TTOH/IEY.

0. CHAMBERS, JR.

DOUGH MIXING MACHINE. APPLICATION FILED AUG. 16,1906.

. m a a a 9 T 6 m w w w w, m I g 9 1 I an w 6 2 \4 L: m i o H i @W t i I ,0 I a 1 v m w A MO /ww g 2 m o 4 ,,,/J I z T Mid W ll 4 O M 2 m 1 2 m 9 A TTORNEK.

0. CHAMBERS, J DOUGH MIXING MACHINE. APPLICATION FILED AUG. 16, 1906.

s SHEETSSHEET 4.

INVENTOR @amvva W,E/&-

4 7'7'0BNEY.

Patented May 11 O I 2! x c. CHAMBERS, JR. DOUGH MIXING MACHI APPLICATION FILED AUG.16,1906

Patented May 11, 1909.

6 SHEETSSHEET 5.

A m/ x13 4? U. CHAMBERS, JR. DOUGH MIXING MACHINE. APPLIOATION IILED AUG.16,1906.

921 ,202; Patented May 11, 1909. v 6 SHEETSSHBET 6.

/ "/C 5z15- 31 x16- rl llllllllll V- WITNESSES INVENTOR MW www z, fl/M. h 6 11mm 4 TTOBHEV.

UNITED STATES PATENT orrrcn 'craus CHAMBERS, JRJ, or ovasneoor, PENNSYLVANIA.

DOUGH MIXING MACHINE.

Specification of Letters Patent.

Patented May 11, 1909.

Application filed August 1c, 1906. S'erialNo. 330,801.

To all whom itmay concern:

Be it known that I, CYRUs CHAMBERS, Jr., a citizen of the United States, residing at Overbrook, in the county of Montgomery and State of Pennsylvania, have invented a new and useful Dough Mixing Machine, of which the following is a s' eciiication.

My invention re ates to improvements in dough mixing machines.

My object is to provide improvedmeans for automatically coding and mixing together, in desired relative proportions, materials for the making of dough.

My invention comprises a receptacle for receiving the materials and means contained therein io-r mixing said materials and aerating the dough, in combination with adjustable means for automatically weighing or delivering flour in required quantities to said view with the flour bin and receptacle and automatic means for measuring and delivering, in required quantities, the liquid with its-ingredients into the said receptacle.

My device comprisesmeans for sitting. thefiour gradually into themixing chamber so that the same will be uniformly mixed with the liquid delivered thereto.

My device also comprises means whereby the dough, sufliciently and properly formed, is discharged from said mixing chamber, so that the repetition of the mixing, kneading and aerating operation may be continued.

My device is especially adapted as a continuously operating machine, that is to o erat-e upon charge after char e'ol" relative y proportioned materials unti any desired quantity or quantities of dough have been formed.

Referring to the drawingsz-Figure l is a front side elevation of a device embodying my invention. Fig. 2 is a rear side elevation of thesarne. Fig. 3 is an end-elevation at the driven end of the machine. 4 is a section on an enlarged scale .on line 4, 4 of Fig. 3. Fig. 5 is an elevation of my device at the end at which the dough is delivered and opposite the driven end. Fig. 6 is a view similar to Fig. 4 with the bucket lowcred into the well. Fig; 7 is a sectional plan air chamber removed. Fig. 8 is a fragmentary view of the discharge nozzle from the conducting spout. Fig. 9 is a section on line 9, 9 of Fig. 8. Fl 10 is a plan view of thecoupling end of the driving shaft. Fig. 11 is an end elevation of same. Fig. 12 is a plan view of the under side of the coupling end of the mixing shaft. Fig. 13 is an end elevation of same. Fig. 14 is a fragmentary view showing the device for the 1proper meshing of the gears of the mixing shai Fig. 15 is a side elevation of the scale hopper and associated mechanism in the closed. preliminary position. Fig. 16 is a similar view in the closed secondary position. Fig. 17 is a similar view showing the scale hopper in the final or discharging position. Fig. 18 isa plan view of the flour bin and the stirring device. Fig. 19 is a sectional detail of pan/L96 and associated mechanism.

Similar numerals refer to similar parts throughout the several views.

Referring to the parts, in the order of their bin, circular. in form, with a flat bottom, of such capacity as to hold the amount of flour necessary or desirable for one continuous run. This binis elevated above the rest of the machinerv and is supported upon extensions 22, 23 and 24 of three of the main posts of the machine. Through the center of the bottom of bin 21 projects a perpendicular shaft 25 to which is connected a stirring device 26 of peculiar construction, shown in Fig. 18, arid more particularly described hereafter. The bin 21 is provided with the opening 27 through its bottom, communicating with the chute 28-, whereby the flour is guided from the bin to the scale hopper 32. Opening 27 is provided with a slide valve 29 supported upon the outer extremity of arm 30 which extends from the center 71 of the weighing beam 31 of the scales. The position of arm 30 with respect to the position of the weighing beam is such that when the scale hopper 32 is-in the preliminary or elevated position and counterweight 33 is in the lowered position, the valve 29 is maintained in the open position to permit of the flow of flour through opening 27 to scale hopper '82. Pins 88 and 89, secured to the underside of flour bin 21, encounter plate or valve member 29 to limit its movement in either direction. Scale hopper 32 is hung in the scale arms 31, on knife edges 34, as usual.- Arms 31 are secured to shaft 90, to which is secured the beam 91. The counterweight 33 is adjustably attached to the scale beam 31 so that it may be moved toward or away from the axis of the scalesas occasion may require, to weigh more or less flour at a charge. The extension oi: scale beam 31 from its axis to the counterweight is r at an angle slightly above the horizontal line;

successive operations, 21 indicates the flour I and cam member tocause the closure of while the scale hopper-is up and the counterweight down, in t e preliminary position for weighing. When the scale .is tip ed, the weight moves into a position at a st greater angle with the horizontal line and nearer to the perpendicular line passing through the centerof gravity of said scale hopper,'so thatsaid counterweight 33 will exert a less force against the scale hopper when in the second or lower position, than when in the preliminary position. The surplus power given to the scale ho per over the counterweight,

when in said ower or secondary position, as

sures the 'closingnf valve 29 beneath the flour bin, that is to say, the scale hopper in the first position forms a delicate weighing arfangement until commencing to tip. It is then provided with increasing abundance of power as it descends with its weighed flour to close valve 29 of the fiour bin 21.

At the lower end of the scale hopper, which isnormallyopen, is provided the swinging valve 35, hung at the. end of theradial arms 36 pivoted at 37. This valve 35 is opened by the cooperation of roller 38 with-cam member 78. Roller 38 is attached to'arm 39 on shaft 40. The compression spring 41 is adapted to work in opposition to roller valve member 35, when roller 38 has cleared cam 78 and the parts have assumed the. initial position. Shaft 40 which causes the roller and cam movement of the valve 35 is driven by the'worm gear42, the worm of which is upon the perpendicular shaft 25 as shown in Fig. 3, hence the movement of this valve in no way interferes with the deli c'acy'of weighing, but is operated positively,

after the tipping of the scales into the open position, an is closed, as above stated, by

the spring 41, which operates between the levers 36 and stud 79 secured to the. walls of hopper 32. Shaft 40 is normally locked witharm 39 by the pawl 96, ivoted to arm 39, engaging with ratchet 95 eyed to shaft 40. This engagement is maintained by the spring plunger '97, see Fig. 19, engaging in one of the recesses 98 in arm 39, so long as the shaft 40- rotates in the proper or normal direction, indicated by the arrows in Figs. 1

15 'and 16. In case however the machine should be operated in the wrong direction, the pawl is forced out of engagement with the ratchet, so that shaft 40 will move inde endently of arm 39, thus preventing the amming of the friction rollers 38 and 45 under the earns 46' and 78, and otherwise straining the machine. A second recess 98 is provided in arm 39 to receive spring lunger 97, to maintain the pawl in such inoperative position until arbitrarily moved by the operator. 7

Another purpose of the pawl and ratchet relationship between shaft 40 and arm 39 is to provide for the arbitrary disengage ment of arm 39 from shaft 40. When the machine is first started it is desirable that no flour be admitted to themixing basin ,until the liquid from the liquid reservoir reaches the basin, so that the flour may not be. sifted into a dry basin. Hence it is necessary to throw out the pawl operating the weighing device -until this condition takes place. Againat the close of the run 7 it is necessary to cut on the further admis- 'sion-of'.v flour while the machine continues running, to complete the mixing and ex el the dough-therefrom. This is secured the hand manipulation of pawl 96 at the beginning, andtoward the end of the run.

It will be understood that the exact amount of liquid required is placed in the reservoir,

and this governs the quantity of breadthat is to be made at one run. The quantity of flour placed in the bin may be more than suflicient for such run, hence, by controlling the flourdelivered from the bin to the basin, all of the liquid may be used, while the surplus flour, not being perishable, may

remain in the bin until wanted for the next run.

The scale hop er 32 is kept in asubstantially(perpendicu ar position bya link 43, connecte I the lower end of the stationary arm 44.

This 'link 43 is substantially the same length as the scale-arms 31, securing a parallel movement by the arm and link, whereby thescalehopper 32 is maintained in a perpendicul'ai Tolinsure the descent of the scale hopper 32, in the event of insufiiciency of flour in bin 21 to deliver a full load, or because of the sticking of machinery-,a cam roller 45 is Thesifting device consists of a hopper having a perforated bottom and a sifting bar for reciprocating over the same. The sifting de vice is supported in any suitable way above the air chamber 72 and mixing-chamber 73. The siftin device does not extend the entire length of t e air. chamber or the mixing basin for the reason hereinafter specified.

A liquid tank 47 is L'-shaped in form'as seen in Fig. 7. 'At the bottom of the smaller arm thereof is located a well 48 into which the measuring bucket 49 is adapted to dip. The

bottom of'the tank 47 is inclined in alldi-ISO near the lower end thereof and with osition, and yet the hopper allowed to rise and fall freely in the act of -weighing.

' of liquid necessary for one continuous run of 1 5 .rections toward the well, all the li uids contained in the tank will run and the long side formsa lip or spout by so that practically to thewe and willbe takenu by the measuring bucket. It is to be note that the well is of such shape and dimension as to readily accommodate the b'ucket therein and at the same time form an approximately close fit therewith, so that when the bucket is forced down into the Well all liquid contained therein is forcedup over the edge of the bucket and into it, thus enabling it to move all the liquid from the tank. Tank 47 is of such dimensions as to hold the required amounts the machine.

The measuring bucket 49 is preferably cylindrical in for with one side of its top margin pro'ecting a considerable distance beyond the alance of said top margin. The distance between the loweredge or portion of the top of the bucket multi lied by its area determines the capacity 0 the bucket which the liquid is delivered to the conducting trough or funnel 55, whence it is discharged mto the mixing basin 73 of the machine. The bucket 49 is carried by a yoke 50 and connecting rod 51 and is guided by friction wheels or lugs projecting into the channels 52 in the erpendicular guide members 54 on each side of the well. Another friction wheel or lug projects into channel 53, in one of said ide members 54. This channel 53 is para lel with channel 52, except at its upper extension, where it is turned at right angles. By this means thebucket is held erpendicular when ascending and deseen mg through the liquid into the tank and into the well. When the bucket is raised however. to near its upperthrow the curved or bent channel 53 causes it to turn into a position inclined slightly beyond the horizontal, thereby allowing the contents of the bucket to empty into the conducting trough or funnel 55 leading to the mixing basin of the machine. It will thus be seen by each stroke of the bucket 49 an exact quantity of liquid is raised and emptied into the basin. Y

The mixing basin and mixin blades are substantially the same as .that shown in m gending application, Serial No. 281,256 filed ctober 4, 1905, exce t that theshafts 81 and 82 project beyond the end of the basin 73 and are carried in an outrigger 80, see Fig. 1, so that the dough may drop from the end of the basin and fall before reachingthe extreme end of the said mixing shafts. Plates 92 and 93 are secured to the outrigger structure at a distance from the end of the air chamher to prevent anydough-from clingin to the I blades 75 or being forced over the en bear ings. Beneath and against the portion of each shaft 81 and '82,. rejecting beyond the air chamber, is secure a scraper platasuch as indicated b 94 in Fi 1, for sore .an dough which may othirwise cling t b ed; portion of the shaft. At the lower side of the basin 73 and near the outer end thereof is located a low dam 77, the object of which will be more clearly described hereafter.

Theconducting member 55 for conveying the liquid from the measuring bucket 49, enters the air chamber 72 above the center line of the mixing shafts 81 and 82 and therefore wholly above the line between the air chamber and mixing object of this being to prevent the stopping of the inlet by the dough in the basin. The mouth 56 of this inlet into the air chamber is of peculiar construction as shown in Fig. 8. That is to say, it is an opening downward or obliquel in the directionoi travel of the mixing lades as indicated by the arrow so that there is no tendency for the dough to be forced into the spout. The sifter 1s inde-' pendent of the air chamber, and is detachably connected therewith by means of the usualspring catches. The air chamber is attached to the mixing basin in the usual manner and is held by spring catches.

The'mixing shafts 81 and 82 have at their ends to which power is supplied, peculiar couplings, whereby they are connected to the drivin shafts 63 and 64 in such manner as to be readily detached, for the purpose of cleaning. As it is necessary that these shafts 81 and 82 shall have a certain position relative to one another so that the knives 75 passin through the same lane at the admission en of the' basin, shal not interfere with one.

another, and also that one mixing shaft shall i not be placed in the machine in the place that belon s to the other. This coupling is so designe as to connect the mixing shafts with the driving shafts only inone means of tapered slots 57and tapered tenons 58 as clearly shown in Figs. 10, 11, 12 and 13.

basin, see Fig. 3. The

position, by

In order that the shafts may not be placed one in the positionof the other these slots are made of a different size so that the one with the largetenon cannot be put in conneetlon with the drivin shaft having the small siot.

Power is app ed to the drivin' shaft 63 by the pulley 83 from any suita'b e source of power and the two I shafts '63 and 64 re caused to rotate relatively to one another y the. gear wheels 59 and 60 having thereon the usual recessed rim 61 and long tooth or proj cation 62 cooperating therewith as shown in Fi 14 to secure their proper assembling.

ower is transmitted from the driving shaft63 by means of bevel gears 99 and 100 to a perpendicular'shaft 25 extendin up to and through the bottom of the flour in :21. The upper end of this shaft connects to the stirring device 2-6 shown in Fig. 18 bymeans of a feather and keyway. Said stirring device bein fitted loosely thereto so that it may lay ygravity on the bottom of the flour bin and adapt itself to any inequalities be added in liquid form to the flour are placed in the tank 47. Power being applied to shaft 63 through pulley 83, the rotation of the stirrer 26 causes the flour to ass through o ening 27 and chute 28 into so e hopper 32, t e wei ht 33 having first been adjusted to counter alance a required amount of flour. When the amount of. flour charged in the scale ho per 32 is sufficient to overcome the counter alancing efiect of weight 33' the scale hopper'falls ordescends into position shown in Fig. 16 which causes the closing of the valve opening 27 and shuts 0E thefurther supply of flour from bin 21. Afurther rotation of shaft 40 caused bythe wornr42 cooperatingwith pinion 88 causes the move ment of arm 39 and the conse uent coopera tion of roller 38 with cam mem er 78 causing the movement of valve gate 35 into the open fiosition as shown in Fig. 17 whereupon the our contained in scale hop er 32 is discharged into the top of the siftin hopper 84; At the same time with eachrevo ution of the crank 68 the bucket is made to dip from the tank 47 a fixed quantity of liquid and discharge the same throu h conductor 55 and --air chamber 72 into -t e mixing basin'7'3,

where it is thoroughly mixed with the flour by the mixing blades 7 5. It is obvious that.

the consistency of they dough produced will depend upon the relative pro ortion offlour and liquid\ which is contro ed by the adjustme'ntof the counterweight 33. For mechanical reasons the amount of liquid discharged with each revolution of the crank 68 is constant. 69 of stirrer 26 is such as to force the flour engaged thereby toward the circumference positively fed through valve 0 ening 27 and chute 28 as long as valve mem er 29 is in the open position. The constant dippingof the bucket 49 into the well 48 causes a thorough agitation of the liquidand its ingredients.

A thorough mixture of the liquid is thereby maintained. As the mixing of the flour and liquid progresses the dough is moved toward The formation of the arms the outlet end of basin 73 by the inclination of the knives 75 causing a feeding of the ma: terial in the direction indicated by the arrows in Fig. 7. The knives 75 also operate to lift up the dough as the same becomes viscous or ropy and to draw it apart and aerate it, say at about one-third of the distance from the liquid inlet end, and the continual addition of flour throughout the balance of the length of the sifter supplies the requisite,

amount to stiffen up the dough and make it of the consistency desiredl When the dough .and beneaththe outer end of the sifter, serves to prevent the liquidfrom' running out before ithas been thickened or stiffened by flour when first starting the machine. By replenishing the flour in the bin 2 land the liquid in tank 47. the machine may be kept continuouslyin'motion as long as desired and thus any quantity of dough can be produced with a comparatively small machine.

It will be observed that the perforated surface of'the sifter is much less than the width of they basin or mixing chamber as shown in Fig. 3 and that its length is only about two thirds the length thereof as shown in Fig. 1. Consequently the area of the sifting surface is only about one-fourth of the area of a horizontal plane throughthe center of the mixing basin.

What I claim is 1'. In a dough mixing machine, the combination of a mixing receptacle, mixing mechanism operating therein and reciprocatng devices for delivering fixed quantities of materials thereto operating relatively to the mixing mechanism and to each other.

2. In a dough mixing machine, the combination of a mixing receptacle, means for intermittently charging li uid thereto, and means for weighing and elivering to said receptacle charges of flour, said charging devices actin relatively. b

3. In a ough mixing machine, the combination of a mixing receptacle, mixing has passed the sifter 74, there is no longer mechanism operating therein, a liquid containing vesse and meansfor delivering'intermittent charges of liquid therefrom to the mixing receptacle and a device for intermittently delivering required quantitiesof flour thereto operating relatively to the mixing mechanism.

4. In a dough mixing machine, the combination ofa mixing basin and mixing mech snisni opereting th" 1 in, Weighing Hitched ism for delivering flour thereto incl assured quantities, inesns for delivering liquid there;

to in measured qne titles, and actuating 5 means for ceusing a re stive operation of the flour and liquid delivering means with respect to esch other.

5. ln s dough mixing machine, the comhinetion of e mixing basin and mixing mechanism cpcreting therein, Weighing mechanism fer delivering flour thereto in measured quantities, means for delivering liquid thereto in measured quantities, actuating means for causing relative operation of the flour and liquid delivering means with respect to each other, and adjustable means for varying the required charge of the Weighing device.

ti. in dough machine, the combination of s mining basin, niechan ism operating therein, means for delivering seperete Weighed clierges of from thereto, s.

liquid reservoir and mechanism epereting' relatively to the niirdng mechanism end the flour charging insane for transferring liquid fixed quantities from the reserveir to the mixing basin.

7. In a dough ndxing inschine, the com" hinsticn of a, mixing basin, mining mechan ism operating therein, e liquid reservoir and mechanism operating relatively to the mixing mechsnisin for transferring liquid in fixed quantities from the reservoir to the mixing basin, said mechanism adapted to maintain an agitation, oi liquid in the reservoir.

in a doegh mining machine, the ccmhinsticn mining receptecle, mixing mechanism operating therein, a liquid sup,

ply and mechanism for transferring the liqnid in fixed quantities from. said liquid supply the mixing receptacle, said transferring inecnsn sze operating relatively to the mix- HlGBnalllSlD,

ln s. dough the combination cl as mixing heski, mechanism operetnig therein, en entcmstic flour weighing device and liquid nieesurin device,

each to b discharge require quantito the mining lie-sin, and

Y eir r lative epersticn.

machine, the comf naming essin, mixing niechsn- I automatic iionr weigh ice gt a lienid measuring device, ecen d te discharge re nit-ed quantities of materiel to the mixing asin, means for secuning their relative operation, and adjustable nseens tor varying the charge of flour necessary to sense the sutonmtic actuation of the Weighing device.

ll ln combination With e dongli mixing 'v. weighing and disthrough its axis of movement, to increase the power of the hopper over the counterweight est-he hopper approaches the lower or ischarge position, a valve mechanism for controlling the discharge of material into the hopper and means operatedby the hopper for actuatin said valve mechanism.

12. Ina ough mixing machine, the combinaticn of a mixing basin, mixing mechanism ogereting therein, an automatically sctucte flour weighing deviceladapted to deliver to the mixing basin, a fiour rece tacle adapted to deliver to the Weighing evice, stirring mechanism ogereting in the receptacle for insuring said elivery, and actuating means for securing a relative operation of the stirring mechanism, weighing device and mean mechanism.

l3. ls a dough mixing machine, the comintention ci a mixing basin and mixing mechanisrn operatin therein, a counterbalancedhop er for we' hing and delivering material to t e mixing asin', a-discharge port in said ho ps1. end s valve for cooperatin therewith en means for operating said va ve, acting relatively to the mechanism.

14. In e dough mixing machine, the com situation of mousing besln an mix ng me henism e eretin therein, a counterbalanced, hopper 'or weigiing and delivering material,

a dischsrge port in said hopper, a valve for cooperating therewith and means for operating said valve, actingeutomatically by ex:

tcrnslly applied owe/r.

l5- ln s dong. mixing ma h ne,- thc combination of e'mix lng'besln en mechenism op rated therein, a liquid t l-I l} and a measuring bucket operated relatively to the mix ng mechanism for dipping liquid fro the tank and delivering it to the mixing hesin.

ln a dough mixing" machine, the comloinetion of .a mixing basin and mixing mechl 10 operating therein, a liquid tsnk and at well draining said tsnk, a measuring bucket fitting snugly in said Well and mechanism operating relatively to the mixing 1 mechanism for dipping thebucket into said 1 it to, a bucket snugly fitting said Well adopted to be lowered therein, mechanism for lower- L25 ing said bucket and for lifting and discharging the same into the mixing basin.

18. In s'dough mixing machine, the coinbinaticn of a mizvzing basin, liquid measuring mechanism comprising e liquid supply, i

when lowered into the measuring bucket suspended on trunnions traveling in vertically extending Ways, and means connected with the bucket for maintaining the same in the vertical --position when lowered and lifted into and out of the liquid supply, and then for tipping it into the discharge position to cause'the transfer of its contents into the mixing basin.

f 19. In a dough mixing machine, the combination of a mixing basin, means -for meas-- uring and delivering flour and li uid to said mixing .basin, a pair of mixin s rafts 0peratin in said basin and provid d'with mixing lades,so. set that by their 'rotation the materials are forced continuously in one direction, and actuating means operating the measuring and deliver' g means and mixing blades relatively.

20. In a do gh mixing machine, the combination of a mixin basin, mixing mechanism operating there1n,-a liquid tankwith an inclined bottom, a well extending below the lowest point of said bottom, a bucket adapted to be lowered into and raised from said well having such exterior dimensions; with respect to said dimensions of the Well that when lowered into the well the liquid containedtherein will be forced upwardly'out v of the well into the bucket. 21. In a dough mixingimachine, the com- .bination of a' mixing basin, mixin mechanism operating therein, a liquid tan with an inclined bottom, awell extending below the lowest point of said bottom, a bucket adapted to be lowered into and raised from said well having such exterior dimensions with-- respect to said dimensions of the well that well the liquid contained therein will be forced u Wardly out of the well into the bucket, an mechanism for moving the bucket and causing the same to discharge into themixing basin.

' 22. In a dough mixing machine, the combination of a mixing basin, a funnel or conducting member connected therewith, a liquid supply adjacent thereto and'mean's for mixing shafts, dri

transferring the liquid therefrom in measured quantities to the funnel and thence to the mixing basin. v

23. In a dough mixing machine, the combination of a mixing basin, mixing mechanism operating therein and relativel operated meansfor delivering flour and liquid thereto, the mixing mechanism comprising blades having faces .angularly disposed "to cause a movement of the dough toward the discharge end of the basin, the basin being 0 on at said discharge end and provided with a ow dam therein'at a distance from said discharge end approximately one-quarter of the longitudinal extension of said basin, substantially as and for the purpose specified. j 24. In a dough mixing machine, the coml bination of a mixing basin, mixing mechanl ism operating therein, comprising a pair of l shafts cooperating therewith, means for disengageably couplin the mixing shafts with the rivingshafts an a recessed rim connected with one shaft and a cooperating projection connected with the other shaft assembling.

25. In a dough mixing machine, the combination of a mixing basln and-mixing mechamsm operating therein, comprising a pair of mixing shafts, a pair of driving shafts and.

slot and tenon means for disengageably connectihg said mixing shafts with their respective drivin shafts, the tenon and slot of one pair of sha ts being of different size than the tenon and slot of the other pair of-shafts to prevent their interchanging.

26. In a dough mixing machine, the combination of a mixing basin, mixing mechanism'o crating therein, an automatically acthereto, adjustable means for controlling the to secure their proper relative -tuate weighing device for delivering flour amount of flour necessary for its automatic actuation, a measuring device for delivering Ii uid thereto, and actuating means for operatln the delivering and mixing means relative y. Y

27. In a dough mixing machine, the combination of a mixing basin, mixing mechanism o crating therein, a storage bin having a disc arge aperture in its bottom, an agitator for causing the movement of flour to the a erture, said agitator consistingof a rotatwo body adapted'to lie by gravityon the bottom of the bin, means for causing the rotation of' the agitator, and automatic mechanism "for conveying flour from the bin to the/mixing basin.

' 28. In a'dough mixing machine,"tl 1e combination of amixing basin, mixing mechan isnicr operating therein, a storage bin having a we aperture, said agitator consisting of a rota? tive body ada' ted to lie b bottom of the in, a chute eading from said discharge aperture, a counterbalanced hop per for receiving material fromlthe chute and delivering it to. the mixin basin and agate for said aperture control edby the move-.

ment of the hop er. a

' 29. In a-doug mixing machine, the combination of a mixing basin, mixing mechanism operating therein, a liquid suppl inech anism'for transferring liquid, from t e liquid supply to the basin, and a funnel or conductor for guiding said liquid into the basin.

gravity on the arge aperture in its bottom, anagitator for causing the movement of flour to the having a nozzle directed away from the line of travel of the mixing mechanism.

30: In a dough mixing machine, the combination of a mixing basin, a pair of shafts with mixing blades operating therein, an air chamber surmounting' the mixing basin, a sifting .hopper surmounting the air chamber and adapted to deliver material, therethfough to the mixing basin, a storage bin for flour having a discharge aperture in its bottom, an agitator for causing the movement of the flour to the aperture, said agitator consisting of a rotatable body adapted to lie by gravity .on the bottom of the bin, and means for causing its rotation, at counterbalanced hopper for receiving the material from the bin, a chute for directing the material from the bin to the hopper, an adjustable weight connected with the counterbalanced hopper for securing'the required amount of material to actuate said hopper, a valve for the aperture of the bin and mechanism operated by the hopper for causing its actuation, a discharge aperture at the base of the hopper and a spring controlled valve for same, mechanism for operating said spring controlled valve, the various parts eing so associated that the counterbalanced hopper, when charged with arpredetermined weight of material, Will move in a substantially vertical direction and thereby cause the closure of the aperture of the bin, and then discharge its contents to the sifter, a liquid reservoir provided with a well, the bottom of. the reservoir inclined to drain to said'well, a bucket and mechanism for operating the same ada ted to move into and out of the Well and to li t an exact or measured quantity of liquid .and dischar e the same tothe mixing chamber and mec anism for causing a desired relative actuation of the several parts.

CYRUS CHAMBERS, JR,

Witnesses:

ISABEL CHAMBERS, C. B. KELLER, Jr. 

